810. ICS FAILURE
2. General. The most important consideration in any ICS failure situation is positive control
of the aircraft. Good headwork and procedural knowledge may enable you to regain use of the
ICS. Failing that, you should return to base as soon as practical if the situation warrants.
Communication is possible by shouting (slowing the aircraft will help) or by passing notes.
Under no circumstances should you assume that the instructor has taken control of the aircraft
without positive confirmation of that fact.
It is possible to communicate between cockpits with an ICS failure
by using the UHF radio.
Check all cords, switches and connections for proper position/condition.
Check volume knob on the audio panel. Ensure it is full volume.
Attempt communication on hot mike with audio panel mixer switches.
Shout or pass notes as necessary.
If unable to communicate verbally and the pilot in the front cockpit wishes to be
relieved, he shall pat the top of his helmet and point to the other pilot. The pilot
taking control of the aircraft will shake the stick to signify assuming control. The
pilot in the front cockpit will then raise his hands above his shoulders to confirm he
has relinquished control.
If the pilot in the rear cockpit wishes to take command of the aircraft, he will shake
the stick with a firm, positive motion. At this time the pilot in the front cockpit will
relinquish the control of the aircraft and raise his hands above his shoulders. Once
again the pilot in the rear cockpit will shake the stick with a firm, positive motion to
verify that he has control of the aircraft.
Use of the front cockpit mirrors may aid in communication between cockpits.
Improper switch settings.
8-22 EMERGENCY PROCEDURES